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JDBC wrapper for the DataStax CQL Java Driver.
/*
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.adejanovski.cassandra.jdbc;
import static com.github.adejanovski.cassandra.jdbc.Utils.NO_RESULTSET;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.InetAddress;
import java.net.URL;
import java.nio.ByteBuffer;
import java.sql.Blob;
import java.sql.Date;
import java.sql.ParameterMetaData;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.RowId;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.sql.SQLNonTransientException;
import java.sql.SQLRecoverableException;
import java.sql.SQLTransientException;
import java.sql.Time;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.datastax.driver.core.BoundStatement;
import com.datastax.driver.core.ResultSetFuture;
import com.datastax.driver.core.exceptions.InvalidTypeException;
import com.google.common.collect.Lists;
class CassandraPreparedStatement extends CassandraStatement implements PreparedStatement
{
private static final Logger LOG = LoggerFactory.getLogger(CassandraPreparedStatement.class);
/** the count of bound variable markers (?) encountered in the parse o the CQL server-side */
private int count;
/** a Map of the current bound values encountered in setXXX methods */
private Map bindValues = new LinkedHashMap();
private com.datastax.driver.core.PreparedStatement stmt ;
private BoundStatement statement;
private ArrayList batchStatements;
//private BoundStatement boundStatement;
//private CassandraResultSet currentResultSet=null;
protected ResultSet currentResultSet = null;
CassandraPreparedStatement(CassandraConnection con, String cql) throws SQLException
{
this(con, cql, ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY, ResultSet.HOLD_CURSORS_OVER_COMMIT);
}
CassandraPreparedStatement(CassandraConnection con,
String cql,
int rsType,
int rsConcurrency,
int rsHoldability
) throws SQLException
{
super(con,cql,rsType,rsConcurrency,rsHoldability);
if (LOG.isTraceEnabled()) LOG.trace("CQL: " + this.cql);
try
{
stmt = this.connection.getSession().prepare(cql);
this.statement = new BoundStatement(stmt);
batchStatements = Lists.newArrayList();
count = cql.length() - cql.replace("?", "").length();
}
catch (Exception e)
{
throw new SQLTransientException(e);
}
}
String getCql()
{
return cql;
}
@SuppressWarnings("boxing")
private final void checkIndex(int index) throws SQLException
{
if (index > count) throw new SQLRecoverableException(String.format("the column index : %d is greater than the count of bound variable markers in the CQL: %d",
index,
count));
if (index < 1) throw new SQLRecoverableException(String.format("the column index must be a positive number : %d", index));
}
/* private List getBindValues() throws SQLException
{
this.statement.b
List values = new ArrayList();
if (bindValues.size() != count) throw new SQLRecoverableException(
String.format("the number of bound variables: %d must match the count of bound variable markers in the CQL: %d",
bindValues.size(),
count));
for (int i = 1; i <= count; i++)
{
ByteBuffer value = bindValues.get(i);
if (value == null) throw new SQLRecoverableException(String.format("the bound value for index: %d was not set", i));
values.add(value);
}
return values;
}
*/
public void close()
{
try{
connection.removeStatement(this);
}catch(Exception e){
}
//connection = null;
}
private void doExecute() throws SQLException
{
if (LOG.isTraceEnabled()) LOG.trace("CQL: " + cql);
try
{
resetResults();
if (this.connection.debugMode) System.out.println("CQL: "+ cql);
if(this.statement.getFetchSize()==0)
// force paging to avoid timeout and node harm...
this.statement.setFetchSize(100);
this.statement.setConsistencyLevel(this.connection.defaultConsistencyLevel);
currentResultSet = new CassandraResultSet(this, this.connection.getSession().execute(this.statement));
//currentResultSet = this.statement.bind(values);
//connection.execute(itemId, getBindValues(), consistencyLevel);
}
catch (Exception e)
{
throw new SQLTransientException(e);
}
}
public void addBatch() throws SQLException
{
batchStatements.add(statement);
this.statement = new BoundStatement(stmt);
if(batchStatements.size()>MAX_ASYNC_QUERIES){
throw new SQLNonTransientException("Too many queries at once (" + batchStatements.size() + "). You must split your queries into more batches !");
}
}
public int[] executeBatch() throws SQLException
{
int[] returnCounts= new int[batchStatements.size()];
try{
List futures = new ArrayList();
if (this.connection.debugMode) System.out.println("CQL statements : "+ batchStatements.size());
for(BoundStatement q:batchStatements){
if (this.connection.debugMode) System.out.println("CQL: "+ cql);
q.setConsistencyLevel(this.connection.defaultConsistencyLevel);
ResultSetFuture resultSetFuture = this.connection.getSession().executeAsync(q);
futures.add(resultSetFuture);
}
int i=0;
for (ResultSetFuture future : futures){
future.getUninterruptibly();
returnCounts[i]=1;
i++;
}
// empty batch statement list after execution
batchStatements = Lists.newArrayList();
}catch(Exception e){
// empty batch statement list after execution even if it failed...
batchStatements = Lists.newArrayList();
throw new SQLTransientException(e);
}
return returnCounts;
}
public void clearParameters() throws SQLException
{
checkNotClosed();
bindValues.clear();
}
public boolean execute() throws SQLException
{
checkNotClosed();
doExecute();
return !(currentResultSet == null);
}
public ResultSet executeQuery() throws SQLException
{
checkNotClosed();
doExecute();
if (currentResultSet == null) throw new SQLNonTransientException(NO_RESULTSET);
return currentResultSet;
}
public int executeUpdate() throws SQLException
{
checkNotClosed();
doExecute();
//if (currentResultSet != null) throw new SQLNonTransientException(NO_UPDATE_COUNT);
// no update count available with the Datastax java driver
return 0;
}
public ResultSetMetaData getMetaData() throws SQLException
{
throw new SQLFeatureNotSupportedException(NOT_SUPPORTED);
}
public ParameterMetaData getParameterMetaData() throws SQLException
{
throw new SQLFeatureNotSupportedException(NOT_SUPPORTED);
}
public void setBigDecimal(int parameterIndex, BigDecimal decimal) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
this.statement.setDecimal(parameterIndex-1, decimal);
//bindValues.put(parameterIndex, decimal == null ? null : JdbcDecimal.instance.decompose(decimal));
}
public void setBoolean(int parameterIndex, boolean truth) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
//bindValues.put(parameterIndex, JdbcBoolean.instance.decompose(truth));
this.statement.setBool(parameterIndex-1, truth);
}
public void setByte(int parameterIndex, byte b) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
//bindValues.put(parameterIndex, JdbcInteger.instance.decompose(BigInteger.valueOf(b)));
//this.statement.setBytes(parameterIndex, ByteBuffer.);
}
public void setBytes(int parameterIndex, byte[] bytes) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
this.statement.setBytes(parameterIndex-1, ByteBuffer.wrap(bytes));
//bindValues.put(parameterIndex, bytes == null ? null : ByteBuffer.wrap(bytes));
}
public void setDate(int parameterIndex, Date value) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
// date type data is handled as an 8 byte Long value of milliseconds since the epoch (handled in decompose() )
//bindValues.put(parameterIndex, value == null ? null : JdbcDate.instance.decompose(value));
this.statement.setDate(parameterIndex-1, value);
}
public void setDate(int parameterIndex, Date date, Calendar cal) throws SQLException
{
// silently ignore the calendar argument it is not useful for the Cassandra implementation
setDate(parameterIndex, date);
}
public void setDouble(int parameterIndex, double decimal) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
//bindValues.put(parameterIndex, JdbcDouble.instance.decompose(decimal));
this.statement.setDouble(parameterIndex-1, decimal);
}
public void setFloat(int parameterIndex, float decimal) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
//bindValues.put(parameterIndex, JdbcFloat.instance.decompose(decimal));
this.statement.setFloat(parameterIndex-1, decimal);
}
@SuppressWarnings("cast")
public void setInt(int parameterIndex, int integer) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
//bindValues.put(parameterIndex, JdbcInt32.instance.decompose(integer));
try{
this.statement.setInt(parameterIndex-1, integer);
}catch(InvalidTypeException e){
if(e.getMessage().contains("is of type varint")){
this.statement.setVarint(parameterIndex-1, BigInteger.valueOf((long)integer));
}
}
}
public void setLong(int parameterIndex, long bigint) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
//bindValues.put(parameterIndex, JdbcLong.instance.decompose(bigint));
this.statement.setLong(parameterIndex-1, bigint);
}
public void setNString(int parameterIndex, String value) throws SQLException
{
// treat like a String
setString(parameterIndex, value);
}
public void setNull(int parameterIndex, int sqlType) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
// silently ignore type for cassandra... just store an empty String
this.statement.setToNull(parameterIndex-1);
}
public void setNull(int parameterIndex, int sqlType, String typeName) throws SQLException
{
// silently ignore type and type name for cassandra... just store an empty BB
setNull(parameterIndex, sqlType);
}
public void setObject(int parameterIndex, Object object) throws SQLException
{
int targetType=0;
if(object.getClass().equals(java.lang.Long.class)){
targetType = Types.BIGINT;
} else if(object.getClass().equals(java.io.ByteArrayInputStream.class)){
targetType = Types.BINARY;
} else if(object.getClass().equals(java.lang.String.class)){
targetType = Types.VARCHAR;
} else if(object.getClass().equals(java.lang.Boolean.class)){
targetType = Types.BOOLEAN;
}else if(object.getClass().equals(java.math.BigDecimal.class)){
targetType = Types.DECIMAL;
}else if(object.getClass().equals(java.lang.Double.class)){
targetType = Types.DOUBLE;
}else if(object.getClass().equals(java.lang.Float.class)){
targetType = Types.FLOAT;
}else if(object.getClass().equals(java.net.Inet4Address.class)){
targetType = Types.OTHER;
}else if(object.getClass().equals(java.lang.Integer.class)){
targetType = Types.INTEGER;
}else if(object.getClass().equals(java.lang.String.class)){
targetType = Types.VARCHAR;
}else if(object.getClass().equals(java.sql.Timestamp.class)){
targetType = Types.TIMESTAMP;
}else if(object.getClass().equals(java.util.UUID.class)){
targetType = Types.ROWID;
}else{
targetType = Types.OTHER;
}
setObject(parameterIndex, object, targetType, 0);
}
public void setObject(int parameterIndex, Object object, int targetSqlType) throws SQLException
{
setObject(parameterIndex, object, targetSqlType, 0);
}
@SuppressWarnings({ "boxing", "unchecked" })
public final void setObject(int parameterIndex, Object object, int targetSqlType, int scaleOrLength) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
switch(targetSqlType){
case Types.VARCHAR:
this.statement.setString(parameterIndex-1, object.toString());
break;
case Types.BIGINT:
this.statement.setLong(parameterIndex-1, Long.parseLong(object.toString()));
break;
case Types.BINARY:
byte[] array = new byte[((java.io.ByteArrayInputStream)object).available()];
try {
((java.io.ByteArrayInputStream)object).read(array);
} catch (IOException e1) {
LOG.warn("Exception while setting object of BINARY type", e1);
}
this.statement.setBytes(parameterIndex-1, (ByteBuffer.wrap((array))));
break;
case Types.BOOLEAN:
this.statement.setBool(parameterIndex-1, (Boolean)object);
break;
case Types.CHAR:
this.statement.setString(parameterIndex-1, object.toString());
break;
case Types.CLOB:
this.statement.setString(parameterIndex-1, object.toString());
break;
case Types.TIMESTAMP:
this.statement.setDate(parameterIndex-1, (Timestamp)object);
break;
case Types.DECIMAL:
this.statement.setDecimal(parameterIndex-1, (BigDecimal)object);
break;
case Types.DOUBLE:
this.statement.setDouble(parameterIndex-1, (Double)object);
break;
case Types.FLOAT:
this.statement.setFloat(parameterIndex-1, (Float)object);
break;
case Types.INTEGER:
try{
this.statement.setInt(parameterIndex-1, (Integer)object);
}catch(InvalidTypeException e){
if(e.getMessage().contains("is of type varint")){
this.statement.setVarint(parameterIndex-1, BigInteger.valueOf(Long.parseLong(object.toString())));
}
}
break;
case Types.DATE:
this.statement.setDate(parameterIndex-1, (Date)object);
break;
case Types.ROWID:
this.statement.setUUID(parameterIndex-1, (java.util.UUID)object);
break;
case Types.OTHER:
if(object.getClass().equals(com.datastax.driver.core.TupleValue.class)){
this.statement.setTupleValue(parameterIndex-1, (com.datastax.driver.core.TupleValue) object);
}
if(object.getClass().equals(java.util.UUID.class)){
this.statement.setUUID(parameterIndex-1, (java.util.UUID) object);
}
if(object.getClass().equals(java.net.InetAddress.class) || object.getClass().equals(java.net.Inet4Address.class)){
this.statement.setInet(parameterIndex-1, (InetAddress) object);
}
else if ( List.class.isAssignableFrom(object.getClass()))
{
this.statement.setList(parameterIndex-1,handleAsList(object.getClass(), object));
}
else if ( Set.class.isAssignableFrom(object.getClass()))
{
this.statement.setSet(parameterIndex-1,handleAsSet(object.getClass(), object));
}
else if ( Map.class.isAssignableFrom(object.getClass()))
{
this.statement.setMap(parameterIndex-1,handleAsMap(object.getClass(), object));
}
break;
}
}
public void setRowId(int parameterIndex, RowId value) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
this.statement.setToNull(parameterIndex-1);
}
public void setShort(int parameterIndex, short smallint) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
this.statement.setInt(parameterIndex-1, smallint);
}
public void setString(int parameterIndex, String value) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
try{
this.statement.setString(parameterIndex-1, value);
}catch(InvalidTypeException e){
// Big ugly hack in order to parse string representations of collections
// Yes, I'm ashamed...
if(e.getMessage().contains("is of type set<")){
String itemType = e.getMessage().substring(e.getMessage().indexOf("<")+1, e.getMessage().indexOf(">"));
this.statement.setSet(parameterIndex-1, Utils.parseSet(itemType, value));
}else if(e.getMessage().contains("is of type list<")){
String itemType = e.getMessage().substring(e.getMessage().indexOf("<")+1, e.getMessage().indexOf(">"));
this.statement.setList(parameterIndex-1, Utils.parseList(itemType, value));
}else if(e.getMessage().contains("is of type map<")){
String[] kvTypes = e.getMessage().substring(e.getMessage().indexOf("<")+1, e.getMessage().indexOf(">")).replace(" ", "").split(",");
this.statement.setMap(parameterIndex-1, Utils.parseMap(kvTypes[0],kvTypes[1], value));
}
}
}
@SuppressWarnings("boxing")
public void setTime(int parameterIndex, Time value) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
// time type data is handled as an 8 byte Long value of milliseconds since the epoch
bindValues.put(parameterIndex,
value == null ? null : JdbcLong.instance.decompose(Long.valueOf(value.getTime())));
}
public void setTime(int parameterIndex, Time value, Calendar cal) throws SQLException
{
// silently ignore the calendar argument it is not useful for the Cassandra implementation
setTime(parameterIndex, value);
}
public void setTimestamp(int parameterIndex, Timestamp value) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
// timestamp type data is handled as an 8 byte Long value of milliseconds since the epoch. Nanos are not supported and are ignored
this.statement.setDate(parameterIndex-1, new Date(value.getTime()));
}
public void setTimestamp(int parameterIndex, Timestamp value, Calendar cal) throws SQLException
{
// silently ignore the calendar argument it is not useful for the Cassandra implementation
setTimestamp(parameterIndex, value);
}
public void setURL(int parameterIndex, URL value) throws SQLException
{
checkNotClosed();
checkIndex(parameterIndex);
// URl type data is handled as an string
String url = value.toString();
setString(parameterIndex, url);
}
public ResultSet getResultSet() throws SQLException
{
checkNotClosed();
return currentResultSet;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private static final List handleAsList(Class objectClass, Object object)
{
if (!List.class.isAssignableFrom(objectClass)) return null;
return (List) object.getClass().cast(object);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private static final Set handleAsSet(Class objectClass, Object object)
{
if (!Set.class.isAssignableFrom(objectClass)) return null;
return (Set) object.getClass().cast(object);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private static final HashMap handleAsMap(Class objectClass, Object object)
{
if (!Map.class.isAssignableFrom(objectClass)) return null;
return (HashMap) object.getClass().cast(object);
}
@SuppressWarnings("rawtypes")
private static final Class getCollectionElementType(Object maybeCollection)
{
Collection trial = (Collection) maybeCollection;
if (trial.isEmpty()) return trial.getClass();
return trial.iterator().next().getClass();
}
@SuppressWarnings({ "unused", "rawtypes" })
private static final Class getKeyElementType(Object maybeMap)
{
return getCollectionElementType(((Map) maybeMap).keySet());
}
@SuppressWarnings({ "unused", "rawtypes" })
private static final Class getValueElementType(Object maybeMap)
{
return getCollectionElementType(((Map) maybeMap).values());
}
@SuppressWarnings("boxing")
@Override
public void setBlob(int parameterIndex, Blob value) throws SQLException {
bindValues.put(parameterIndex,value);
}
@Override
public void setBlob(int arg0, InputStream arg1) throws SQLException {
// TODO Auto-generated method stub
}
}